Rotary-gear-motor hoist



March 18 1924. 1,487,051 J- DITSON RQTARY GEAR mo'roa I-IOIST Filed July 20. 1921 2 Sheets-Sheet 1 INVENTOR BY 75W 14, ATTQR EY Patented Mar. 18, 1924.

JESSE DI'ISON, OF LITTLETON, COLORADO, ASSIGNOR T'O INGERSOLL-BAAND COMPANY,

OF JERSEY CITY, NEW JERSEY, A CORYORATION OF NEW JERSEY.

ROTARY-GEAR-MOTOR HOIST.

Application filed July 20,

To all whom it may concern:

Be it known that 1, Jesse DITSON, a citizen of the United States, and a resident of Lit-tleton, Arapahoe County, Colorado, have invented a certain Rotary-Gear-Motor Hoist, of which the following is a specification accompanied by drawings.

This invention relates to hoists, but more particularly to a single drum hoist adapted to be driven by a fluid pressure motor of the rotary gear type.

Such a rotary gear motor is simple in construction and exceptionally strong and rugged so that it is peculiarly fitted to withstand excessive vibration and the hard and rough usage and even neglect to which hoists of this character are subjected in ordinary use for hauling, lifting, loading and other uses in mines, factories, ship yards and numerous other places. 1

The construction of the hoist itself should be substantially equally strong and rugged, because the machine will be expected to perform efficiently under the most adverse circumstances, in mines for instance, when covered with muck and slime mixed with water containing deleterious acids or when exposed to the elements for long periods out doors without oiling or other attention.

The objects of the present invention are to produce 'a hoist which will successfully meet these conditions of use, without breakage of parts or frequently getting out of order, and at the same time is simple in construction, cheap to manufacture and readily assembled and. disassembled the latter feature being a highly desirable requisite, since repairs or adjustment must sometimes be made-on the job under adverse circumstances and without adequate facilities.

Further objects of the invention will hereinafter appear and to all of these ends the invention is shown in one of its preferred and simplest forms in the accompanying drawings in which- Figure 1 is a longitudinal sectional elevation partly broken away;

Figure 2 is an end view of the motor end of the hoist partly in transverse vertica section on the line 2-2 of Figure 1 looking in the direction of the arrows;

Figure 3 is a detail view of the lower portion of the same end of the hoist shown in Figure'2 with the distributing valve in a different position, and

1921. Serial No. 486,099.

Figure 4 is a detail transverse sectional elevation through the clutch on the line 4.-4: of Figure 1 looking in the direction of the arrows.

Referring to the drawings the base plate A of the hoist is provided with the end frames B and C which may or mayv 'not be formed integrally with the base plate as desired. The hoist is adapted to be clamped to a column, cross bar or other su port by means of the clamping member I on the base plate, the saddle clamp E and the bolts F. A rotary gear motor cylinder G and outer cylinder head H are removably secured to the frame B as by means of the cylinder head studs J and nuts K. A screw L passing through the cylinder G into the frame B serves to adjust and center the cylinder prior to securing the head H there-to.

A tubular center bearing 0' is secured to the frames B and C, in any suitable manner, in this instance, areduced portion P at one end of the center. bearing being threaded into the frame B and the opposite end of the center bearing having a groove Q with which a set screw R cooperates. The center bearing spaces the frames apart, strengthens the structure and forms a bearing for the drum rotatably mounted thereon. A rope or cable T has one end suitably secured to the drum as by means of the clamping set screw U.

A relatively long driving shaft V extends through the bushings W in the center hearing and is provided with the ball bearing X in the frame B and the ball bearing Y in the outer cylinder head H. A driving gear Z is mounted on the'shaft V to rotate therewith and a second driving gear a is mounted on the relatively short driving shaft 6 havinga ball bearing 0 in the frame B at one end and supported at the other end in the cylinder head H The end frame 'B is formed with an inwardly extending flange which forms a closure for one of the drum flanges, and the end frame C closes the drum flange having the internal gear t,

l so that dirt and grit are kept from the rotating parts of the hoist, and these flanges also serve as a safeguard for the operator.

The driving shaft V is provided with the driving pinion d at its opposite end held loosely on the shaft by e retaining ring e. The driving pinion d is provided with a clutch member f adapted to cooperate with a clutch member on the clutch collar 9 slidable on the squared end it of the driving shaft V. but rotatable therewith. A yoke j carried by the clutch yoke shaft is engages the clutch collar 7 and is adapted to be rocked by means of the clutch lever having a spring actuated stop pin p.

The driving pinion d meshes with an intermediate gear 9 rotating with the shaft 1' of the intermediate pinion s which meshes with the internal ear I? of the drum S. The intermediate P1111011 shaft r has a ball hearing it in the frame C and another ball bearing -v in the gear box w removably secured to the frame C as by means of the cap screws 1 When rotation is imparted to the driving shaft V, the gearing for driving the drum S may be connected and disconnected by means of the controlling clutch operated by the level 0.

The drum is preferably provided with a brake band 00', the ends of which are con-.

nected to the brake nuts 3 and a traveling on the reversely screw threaded portions 2 and 3 of the brake screw 4 suitably mounted on the base plate A. The brake screw 4 is conveniently rotated by means of a brake lever or handle 5 connected to the brake screw extension 6, having a tongue and.

groove or other suitable connection with the brake screw 4. A groove 7 in the extension 6 receives a pin 8 for preventing longitudinal movement and a similar groove 9 at the opposite end of the brake screw 4 receives a pin 10. For a similar purpose the pins pass through the sleeves 11 and 12 within the bearing lugs 13 and 14 forming bearings for the brake operating device. As the brake lever handle 5 is rocked in one direction or the other the brake ban-d will be tightened o loosened as desired.

Suitable means preferably in the form of a valve 13 are provided in the cylinder head H .for supplying and distributing motive:

fluid to the cylinder G for actuating the rotary gears Z and aP- by means of fluid pressure. Motive fluid is supplied at the inlet 14 and exhausted at the outlet 15, and the cylinder head H is provided with a valve chest 16 in which the valve 13 operates. The valve is formedwith the heads 17, 18 and 19, and is provided with a rack 20 engaging a pinion 21 o erated by the valve lever 22. Valve springs 23 and 24 are adapted to be compressed between the ends of the valve and the plugs 25 and 26.for resisting the movement "of the valve.

The inlet 14: connects with the central passage 27 in the valve chest and the exhaust outlet 15 connects with the exhaust passage 28 which communicates at the ports 29 and 30 with the ends of the valve chest.

The ports 31 and 32 in the valve chest are combined admission and exhaust ports for the motor, either one supplying motive fluidcent-ra-lly between the gears when acting as an admission port, while the other acts as an exhaust. port, so that the direction of rotation is determined by the direction offlow of motive fluid through ports 31 and 32. In the position of the valve shown in Figure 2, motive fluid is admitted from the central passage 27 to the port 32 acting as an admission port and causing the ears Z and a to rotate in the direction 0 the arrows and fluid is exhausted from the port 31, which now becomes an through the port 29, exhaust passage 28 and exhaust outlet 15. When the valve is thrown to the opposite position as indicated in Figure 3, motive fluid is admitted to the motor between the gears through the port 31 acting as anadmission port and causing the gears to rotate in the opposite direction and the port 32 becomes an exhaust port communicating with the port 30, exhaust passage 28 and exhaust outlet 15.

In the operation of the hoist, let it be assumed that the controlling clutch for the driving pinion rl is thrown into engagement with the driving pinion and that motive fluid is being sup-plied to the motor. The driving shaft V will be rotated in a given direction and rotation will be imparted to the drum'S in the desired direction. Upon reversal of the motor the direction of rotation of the drum will also be reverse-d.

I claim:

In a hoist, the combination of a base plate, an end frame carried by the base plate, a hollow center bearing supported at one end in said end frame, means for supporting the opposite end of the center bearing, a flanged drum rotatable on said center bearing and having one of its ends closed by said end frame, a motor cylinder secured directly to said end frame, an outer head secured to said cylinder and closing the outer side thereof, a drum driving shaft having hearings in the outer head, end frame and center bearing, means for opera-- tively connecting the drum with said shaft, a motor for operating said shaft comprising a pair of gears, one of said gears mounted on the driving shaft,.a relatively short driving shaft having a bearing at one end in the end frame and supported at the outer end in the cylinder head, a gear mounted on said short driving shaft meshingwith said first mentioned gear, and a valve in the outer head for controlling the supply and distribution of motive fluid to said motor.

In testimony whereof I have signed this specification.

' JESSE DJITSO'N.

exhaust port, 

